<!doctype html>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/resources/testdriver.js"></script>
<script src="/resources/testdriver-vendor.js"></script>
<script src="/resources/testdriver-actions.js"></script>
<script src="../resources/test-helper.js"></script>
<head>
<title>Dropping image on horizontal iframe scrollbar</title>
<style type="text/css">
p:first-child
  {padding-left:1em;}
iframe
  {height:3em;
  width:4em;}
img
  {width:5px;
  height:5px;}
</style>
<script type="application/ecmascript">
function dragImage()
  {event.dataTransfer.effectAllowed = 'copy';}
function dropImage(event)
  {document.querySelector('p + p').firstChild.nodeValue = 'PASS';}
</script>
</head>
<body ondragenter="event.preventDefault()" ondragover="return false">
<p><img src="" alt="PNG green pixel" ondragstart="dragImage()"/></p>
<p>Drag little square above and drop it on horizontal scrollbar. Word PASS should appear once you drop it.</p>
<iframe src="helper-drop-horizontal-scrollbar.xhtml">XHTML document</iframe>
<script>
async function test(){
  await new Promise(loaded => window.addEventListener("load", loaded));
  const img = document.querySelector('img');
  const iframe = document.querySelector('iframe');
  const innerDoc = iframe.contentDocument || iframe.contentWindow.document;
  const div = innerDoc.querySelector('div');
  function onDropCallBack(event) {
    dropImage(event);
    assert_equals('PASS', document.querySelector('p + p').firstChild.nodeValue);
    return true;
  }

  dragDropTest(img, div, onDropCallBack, 'Dragging the image to the horizontal iframe scrollbar should copy it there', iframe);
}
test();
</script>
</body>
</html>
